Patent Application
20150284043
1. Field of the Invention
The present invention relates to a control mechanism of the adjustable seat post for a bicycle, and more particularly to a control mechanism which is fixed to the bottom end of the lower outer tube of the seat post, and of which the controlling wire will not generate a residual wire when said controlling wire manages said control mechanism for seat height adjustments.
2. Description of the Prior Art
Generally, the seat post of a bicycle is inserted into the seat tube of said bicycle; a prior art seat post, as shown in
It is against the background and the drawbacks associated therewith that the present invention has been developed.
The object of the present invention is to provide a control mechanism of the adjustable seat post for a bicycle which not only generates no residual wire after the seat height is adjusted downwards but also involves an element of novelty.
The present invention includes a pull-down oil hydraulic unit, which is secured to the bottom end of the lower outer tube of a seat post and is used to drive a pin inside said seat post to axially move upwards; said pull-down oil hydraulic unit comprises a body, a partition member, a pulling member and a lower pin. Wherein, said body is provided with a hollow chamber, of which the top end is arranged with an upper opening and the bottom end is arranged with a lower opening. Said partition member is secured inside said body so as to partition off the interior of the chamber within said body to form an inner section and an outer section, and moreover, the outer wall of the bottom end of said partition member is provided with a through-hole enabling the inner section and the outer section to communicate with each other. Said pulling member is arranged inside said inner section and may be controlled to move axially within said inner section; the bottom end of said pulling member is fastened to one end of a controlling wire, and moreover, the other end of said controlling wire passes through said lower opening of said chamber; wherein the outer wall of the top end of said pulling member is provided with a raised rim, and the outer wall of said raised rim is configured with an upper sealing ring allowed to touch said partition member; wherein the inner wall of said inner section is arranged with a lower sealing ring touching the outer wall of said pulling member, so that an inner oil chamber is formed among said partition member, said pulling member, said upper sealing ring and said lower sealing ring; wherein said inner oil chamber is communicated with said through-hole. Said lower pin is arranged inside said outer section and may move axially within said outer section; wherein, the top surface of said lower pin is configured with a protruded push-block which corresponds to the bottom end of a main pin inside said seat post through said upper opening of said body; an outer oil chamber is arranged between said lower pin and said partition member. Said pulling member may be pulled downwards by said controlling wire so that said pulling member may move axially to push the oil within said inner oil chamber into said outer oil chamber through said through-hole, and thus, said lower pin is simultaneously driven to move upwards to enable said protruded push-block to move upwards to push said main pin to axially move upwards to direct said oil hydraulic mechanism inside said seat post to release pressures so as to adjust the seat height. Said pull-down oil hydraulic unit is fastened to the bottom end of the lower outer tube of the seat post, hence said pull-down oil hydraulic unit will not generate a residual wire that occurs in a prior art seat height adjusting device after the seat height is adjusted.
In order that the present invention may be more fully understood, a preferred embodiment thereof will now be described with reference to the accompanying drawings, in which:
The means for achieving the aforesaid objective and the functions of the present invention will become apparent from the following description, taken in connection with the accompanying drawings, wherein a preferred embodiment of the present invention is disclosed.
Referring to
a body 31 which is provided with a hollow chamber 310, wherein said hollow chamber 310 has a top end arranged with an upper opening 311 and a bottom end arranged with a lower opening 312;
a partition member 32 which is secured inside said body 31 and partitions off the interior of the chamber 310 within said body 31 to form an inner section 315 and an outer section 316; moreover, the outer wall of the bottom end of said partition member 32 is provided with a through-hole 320 enabling the inner section 315 and the outer section 316 to communicate with each other;
a pulling member 33 which is arranged inside said inner section 315 and is allowed to move axially within said inner section 315 when being pulled, wherein said pulling member 33 has a bottom end fastened to one end of a controlling wire 330 (such as a steel cable); wherein the other end of said controlling wire 330 travels through said lower opening 312 to be combined with a wire-control device fixed to the bicycle handlebar; moreover, said pulling member 33 is provided with a raised rim 331 on the outer wall of the top end thereof; wherein the outer wall of said raised rim 331 is configured with an upper sealing ring 332 fixed to said outer wall of said raised rim 331 so as to allow said upper sealing ring 332 to touch said partition member 32; the inner wall of said inner section 315 is arranged with a lower sealing ring 333 which is inserted into said inner wall of said inner section 315 so as to allow said lower sealing ring 333 to touch the outer wall of said pulling member 33 so that an inner oil chamber 334 is formed among said partition member 32, said pulling member 33, said upper sealing ring 332 and said lower sealing ring 333; wherein said inner oil chamber 334 may communicate with said through-hole 320; in addition, said pulling member 33 is provided with a recessed section 335 on the outer wall of the bottom end thereof; wherein the lower portion of said body 31 inner wall corresponding to said recessed section 335 on the bottom end of said pulling member 33 is provided with a radial threaded hole 336 allowing a screw 34 with external threads 340 to be screwed to, wherein the tail end of said screw 34 is inserted into said recessed section 335 on the bottom end of said pulling member 33; and
a lower pin 35 which is arranged inside said outer section 316 so as to be allowed to move axially within said outer section 316; wherein, the top surface of said lower pin 35 is arranged with a protruded push-block 350, which is configured within said upper opening 311 of said partition member 32 and corresponds to the bottom end of a main pin 36 inside said seat post 3; wherein, said oil hydraulic mechanism within said seat post 3 may release pressure so as to adjust the seat height when said main pin 36 is pushed to axially move upwards by said lower pin 35. An outer oil chamber 353 is arranged between said lower pin 35 and said partition member 32. The lower portion of said lower pin 35 outer wall is provided with a raised rim 351, of which the outer wall is disposed with a sealing ring 352 tightly touching the interior wall of said body 31; moreover, the interior of said outer section 316 is provided with a sliding space 37 which allows said lower pin 35 to move axially.
After all of the aforementioned members are fully assembled, one end of said controlling wire 330 may be threaded into a down tube 21 via the bottom end of said seat tube 20, and then be pulled outwards through the through-hole at the bottom end of said down tube 21 so as to be secured to the wire-control device fixed to the bicycle handlebar. Moreover, the loosening or tightening of said controlling wire 330 is managed by the wire-control device.
Referring to
In addition, the inner wall of the top end of said recessed section 335 of said pulling member 33 may touch the tail end of said screw 34 so as to prevent said pulling member 33 from excessively moving downward when said controlling wire 330 is pulled to drive said pulling member 33 to move to a limit position.
Said pull-down oil hydraulic unit is fixed to the bottom end of the lower outer tube of the seat post, so that said pull-down oil hydraulic unit will not move when the seat height is adjusted; therefore, the controlling wire disclosed in the present invention will not generate a residual wire that occurs in a prior art seat height adjusting device after the seat height is adjusted.
It will be appreciated by those skilled in the art that variations and modifications to the invention described herein will be apparent without departing from the spirit and scope thereof. The variations and modifications as would be apparent to persons skilled in the art are deemed to fall within the broad scope and ambit of the invention as herein set forth.
